size it up.

A little perspective

Trust your eye.

Five comparisons. Two objects each time. How close can you get?

  1. Compare

    The object on the left is your measuring stick. Keep resizing — the view automatically zooms out when you need more room. You can also zoom the canvas; both objects scale together without changing your estimate.

  2. Find the right size

    Drag the blue handle, scroll while hovering it, tap − / +, or use the arrow keys. Match the dimension in the question.

  3. Lock it in

    Reveal the real size and earn up to 100 points. Five rounds add up to a maximum of 500.

The first answer in each round counts. A new challenge arrives every day at 00:00 UTC. Object sizes use the specific examples shown in the answer.

Read the full rules and scoring guideLet’s play

THE LEADERBOARD

See how you
measure up.

Good eyes. Small margins. A little friendly competition.

5rounds500possible points
Make your mark

A fresh challenge at 00:00 UTC

CHOOSE A DATE
October 2026
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Daily challenges follow UTC.Go to today
Back to today

The day’s best eyesFinal

1,703 entries

#1TOP SCORE

Crisp Datum

Australia
485 / 500
#2

Amber Plumb

Australia
448 / 500
#3

Modest Maple

France
410 / 500

The full lineup

A perfect eye scores 500.
October 8, 2026 Size It Up rankings. Equal scores share the same rank.
RankEntryCountryScore
01Crisp DatumAustralia485 / 500
02Amber PlumbAustralia448 / 500
03Modest MapleFrance410 / 500
04Tall FalconThailand403 / 500
05Crisp FalconItaly392 / 500
06Swift NotchSweden390 / 500
06Golden PlumbDenmark390 / 500
08Calm BadgerGermany389 / 500
09Warm LeaguePoland386 / 500
10Golden MarmotGermany383 / 500
11Quiet FinchSpain382 / 500
12Wild FinchRussia378 / 500
13Modest WillowSpain373 / 500
14Tiny SparrowIndia371 / 500
15Warm PloverTürkiye370 / 500
16Wild NotchGermany369 / 500
17Tiny LeagueGermany366 / 500
18Quick MeadowUnited States363 / 500
19Amber OtterTürkiye361 / 500
20Sunny GaugeUnited Arab Emirates359 / 500
21Tiny BirchFrance357 / 500
22Silver ThistleGermany356 / 500
23Still BadgerGermany355 / 500
24Keen MarmotSpain353 / 500
24Patient MapleGermany353 / 500
26Tall HeronMongolia352 / 500
27Merry HarborItaly351 / 500
28Nimble SparrowSpain350 / 500
29Calm SparrowUnited States349 / 500
29Quiet FalconFrance349 / 500
31Wild MarmotGermany348 / 500
31Lucky LeagueUnited Kingdom348 / 500
33Swift CedarFrance347 / 500
34Amber BirchUnited States346 / 500
35Tall BadgerItaly345 / 500
36Crisp DatumGermany344 / 500
36Calm BirchFrance344 / 500
36Gentle HeronDenmark344 / 500
39Soft LanternGermany343 / 500
40Amber OtterFrance342 / 500
40Bright LanternPoland342 / 500
42Soft MarmotAustria341 / 500
43Crisp GaugeUnited States340 / 500
43Warm ThistleUnited States340 / 500
45Sunny DatumUnited Kingdom339 / 500
45Bright BirchUnited States339 / 500
47Steady CloverGermany338 / 500
47Brave HeronMongolia338 / 500
49Merry BadgerUnited States337 / 500
49Wild OtterItaly337 / 500

Showing the top 50 entries.

This day is closed. Play today

Five rounds. 500 possible points. Equal scores share a rank.

How the leaderboard works

Your first completed challenge counts. Completed daily challenges automatically join the leaderboard with your current nickname; no sign-in is needed. You can edit your nickname, avatar, and country or region from your profile. Your connection may supply an initial country or region for the flag. Your email is never shown. Daily challenges close at 00:00 UTC. Earlier leaderboards remain available, but no longer accept scores. Monthly rankings follow the UTC calendar month.